John dunwell brown



(No Model.)

.J. D. BROWN. Spark Arrester.

No. 236,415. Patented Jan. 11, I881.

N-PETERS. FHOTO-LITHOGRAPKER. WASHINGTON. l1 c.

UNTTE STATES PATENT EETcE.

JOHN D. BROWN, OF NEVVYORK, N. Y., ASSIGNOR OF TWO-THIRDS TO MATTHE\V L. HARNEY AND PETER J. VANDERBILT, OF SAME PLACE.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 236,415, dated January 11, 1881.

Application filed August .20, 1880. (No model.)

To all whom it may concern:

Be it known that I, JoHN DUNWELL BROWN, a citizen of the United States, residing in the city, county, and State of New York, have invented a certain new and useful Improvement in Spark-Arresters for Locomotives, Steamboats, and Stationary Engines; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being bad to the accompanying drawings, which form part of this specification, in which- Figure l is a side view of a smoke-stack, 1 partly in section, showing my invention and Fig. 2 is a horizontal section through line or w of Fig. 1.

My invention relates more particularly to that class of spark-arresters which collect and retain thesparks within the stack, from whence they are removed from time to time, as occasion requires.

The best means now or heretofore known for collecting sparks in locomotive'stacks has 2 been by means of a deflector, generally an inverted cone placed above the draft-pipe within the stack, against which the exhaust-steam is made to strike, deflecting the sparks carried up by it into a pocket formed by the space between the draft-pipe and outer shell of the stack, the only difficulty attending the use of same being that, as it must be of a larger diameter than the draft-pipe in order that all the sparks may strike it, it most generally becomes so large as to materially affect the steaming qualities of the locomotive.

To use a small deflector over a large draftpipe and retaining the steaming qualities unimpaired is the object of this invention, and is accomplished as shown in the drawings, where a series of grooved slabs, A A A, are placed within the upper portion of the draft or smoke pipe, the said slabs being placed a distance apart and converging into a small space in the center. The openings between the said slabs are covered by another series of like slabs, B B B, placed a short distance above and converging in like manner to the center, where they may be attached to the same ring which supports the top of the lower series, or they may be fastened to a ring of a little larger diameter. Over this smalldiameter is placed adetlector, G, and the steam from the exhaust passing up from the draft or smoke pipe D, encountering the slabs A A A and B B B, passes outward between the slabs, while the sparks accompanying the steam are caught in the upper and lower grooved slabs, and are carried by their momentum against the deflector, from whence they are thrown into the pocket E, and from whence they are removed by the appliances shown at the base of the lift-pipe, F being a sleeve fitting loosely around the base of the draft-pipe D and resting upon a few small projections from the draft-pipe, merely to keep it in place. G G, 82.0., are arms projecting from the sleeves, to act as scrapers, so that as the sleeve is turned the arms or scrapers bring the sparks lying in the pocket around until they are discharged through the pipe H into any receptacle placed to receive them.

The upper portion or rim of the sleeve is provided with small projections J, which are operated upon by the spokes K, attached to the rod or handle L, which rod or handle is held to the draft-pipe in the socket M at one end, and at the other end resting in an orifice in the stack, where it may be operated by a removable handle, or may extend through the orifice and form its own handle, as shown. As the handle is turned it sets the scrapers in motion, which brings the sparks around from the back part of the draft-pipe, as well as in front, anddischarges them into and outthrough the pipe or orifice H, care having been taken in this arrangement to avoid any combination which may cause any sticking by reason of rust.

lf desirable to beat the cinders into fine pieces and send them out of the stack with the eXhaust'ste-am, and not to catch them inthe pocket, the two series ofslabs, instead ofstanding a short distance below the cone or deflector, may be brought up to a point or attached to any solid disk or casting, where, as they strike, they fall backward to be brought up again, this process continuing until the particles become line enough to pass outward through the slabs with the exhaust-steam. 10o

Having thus described my invention, what 2. In asperk-arrester, the sleeve F, scrapers I claim as new, and desire to secure by Let- G G, and handle L, in combination with draftto ters Patent, is pipe D and orifice H, all arranged substan- 1. In a spark-arrester, the double series of tially as and for the purposes herein set forth. 5 curved slabs A A A and B B B, in coxnbina- JOHN DUNWELL BROWN.

tion with the draft or smoke pipe D, all ar- Witnesses: ranged substantially as and for the purposes W. B. SPOONER, herein set forth. CHAS. W. JOHNSTON. 

